import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

public class TcpEchoClient {
    private Socket socket = null;

    public TcpEchoClient(String serverIp, int serverPort) throws IOException {
        socket = new Socket(serverIp,serverPort);
    }

    public void start() {
        System.out.println("客户端启动！");
        try(InputStream inputStream = socket.getInputStream();
            OutputStream outputStream = socket.getOutputStream()) {
            Scanner scanner = new Scanner(inputStream);
            Scanner scannerIn = new Scanner(System.in);
            PrintWriter printWriter = new PrintWriter(outputStream);

            while(true){
                //1. 从控制台读取数据
                System.out.println("-> ");
                String request = scannerIn.next();
                //2. 把请求发送给服务器
                printWriter.println(request);
                printWriter.flush();
                //3. 从服务器读取响应
                if(!scanner.hasNext()){
                    break;
                }
                String response = scanner.next();
                //4. 打印响应结果
                System.out.println(response);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static void main(String[] args) throws IOException {
        TcpEchoClient client = new TcpEchoClient("127.0.0.1",9090);
        client.start();
    }
}
